The thing about a lace skirt that nobody mentions in the shop is where the lining ends up after a few wears. If it's cut even slightly short of the lace itself, you get a visible line at the knee or a gap at the waistband where the two layers shift at different speeds when you sit down. You want the lining built to the same hem, sewn in properly rather than just a slip you're meant to wear underneath, because a separate slip rides up under tights by lunchtime and there's no fixing that in a meeting.
Colour wise, the easiest lace to live with is the kind where the lace and the lining are close in tone rather than fighting each other, so the pattern reads as texture rather than a graphic print sitting on top of fabric. A navy lace over navy lining, or a soft camel over a slightly darker nude, wears for years because it doesn't date the way a stark white on black floral does. Black on black is the safest of the lot and also the one that photographs as nothing more exciting than a plain skirt from a distance, which is sometimes exactly what you want. Bright lace over contrasting lining looks lovely on the hanger and tends to get worn twice.
For pairing, a lace skirt wants plain company. A fine knit jumper tucked in, a simple shirt, a plain t-shirt in warmer months, anything with its own pattern or heavy texture turns the whole outfit busy. It's also one of the few skirts that takes flat boots and trainers as well as it takes heels, which makes it earn more days in rotation than it looks like it should.
On fit, check the waistband sits where it says it sits rather than where the lace pattern happens to stop, because some are cut so the waist seam lands right on a lace motif and you end up with an odd bulge of pattern at the hip on one side and not the other. Go with your usual size in the lining measurement, not the lace, since the lace itself often has a tiny bit of give that the lining doesn't share. Watch the back for shortening when you sit, a flaw more common in cheaper cuts where the lining is cut generously but the overheard lace isn't.
Lace holds up well if you wash it on a cool cycle inside a bag and let it dry flat, it loses shape fast on a hot radiator. It softens with wear rather than wearing out, which is rare.
Put one on with a jumper you already reach for constantly and it stops looking like your work outfit.